Surface mounted crystal resonator

Abstract

An object of the invention is to provide a surface mounted resonator that improves impact resistance by the shape of a mounting terminal provided on an outside bottom face of a stacked resonator. A surface mounted crystal resonator is provided with a plurality of mounting terminals electrically connected to a hermetically sealed crystal piece at both ends of an outside bottom face having a rectangular shape long in the lengthwise direction, the mounting terminals having the same external dimensions with a total dimension of the mounting terminals in a lengthwise direction of the outside bottom face being 70% or more [but less than 100%] of a dimension in the lengthwise direction of the outside bottom face. Respective facing sides of the mounting terminals facing each other in a central area of the outside bottom face are formed curved in a convex shape such that a curvature thereof decreases gradually.

Description

TECHNICAL FIELD[0001]The present invention relates to a surface mounted crystal resonator (hereinafter, referred to as “surface mounted resonator”) provided with a mounting terminal on an outside bottom face, and more specifically, relates to a stacked crystal resonator (stacked resonator) with improved impact resistance.BACKGROUND ART[0002]1. Background of the Invention[0003]The surface mounted resonator, because of its small size and lightweight, is built into, for example, portable electronic devices as a reference source for frequency and time. As one of these surface mounted resonators, there is a stacked resonator with particularly small thickness, and for example, there is a stacked resonator in which both of a vibrating plate and a holding plate are made of crystal, and these are directly bonded (refer to Patent Document 1).[0004]2. Prior Art[0005]FIG. 5 is an explanatory diagram of one conventional example of a stacked resonator, wherein FIG. 5A is a sectional view on arrow...

AI Technical Summary

Benefits of technology

The present invention is about a design for a surface mounted resonator (a type of electronic component) that reduces stress concentration during impact. The design includes a holding plate with fixed ends and a thin bottom wall layer made of crystal or glass. The thin bottom layer helps to absorb impact and distribute the force evenly across the holding plate, reducing the risk of damage to the component. The overall effect is a more robust and reliable surface mounted resonator that can withstand impact without being damaged.

Problems solved by technology

However in the conventional stacked resonator having the above-described configuration, there is a problem in that after the stacked resonator is mounted on the set substrate 5 shown in FIG. 5A, a crack such as a chip or fracture may be generated in the first holding plate 2, and further, in the connecting bar 1d of the vibrating plate 1, for example, due to dropping impact from above.

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